Linked Life Data

21445881

Source:http://linkedlifedata.com/resource/pubmed/id/21445881

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2011-7-19
pubmed:abstractText
A lab-scale sequencing batch reactor fed with real municipal wastewater was used to study nitrous oxide (N(2)O) emissions from simulated wastewater treatment processes. The experiments were performed under four different controlled conditions as follows: (1) fully aerobic, (2) anoxic-aerobic with high dissolved oxygen (DO) concentration, (3) anoxic-aerobic with low DO concentration, and 4) intermittent aeration. The results indicated that N(2)O production can occur from both incomplete nitrification and incomplete denitrification. N(2)O production from denitrification was observed in both aerobic and anoxic phases. However, N(2)O production from aerobic conditions occurred only when both low DO concentrations and high nitrite concentration existed simultaneously. The magnitude of N(2) O produced via anoxic denitrification was lower than via oxic denitrification and required the presence of nitrite. Changes in DO, ammonium, and nitrite concentrations influenced the magnitude of N(2)O production through denitrification. The results also suggested that N(2)O can be produced from incomplete denitrification and then released to the atmosphere during aeration phase due to air stripping. Therefore, biological nitrogen removal systems should be optimized to promote complete nitrification and denitrification to minimize N(2)O emissions.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1097-0290
pubmed:author
pubmed:copyrightInfo
Copyright © 2011 Wiley Periodicals, Inc.
pubmed:issnType
Electronic
pubmed:volume
108
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2036-45
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Effect of oxic and anoxic conditions on nitrous oxide emissions from nitrification and denitrification processes.
pubmed:affiliation
Department of Civil, Architectural, and Environmental Engineering, Illinois Institute of Technology, 3201 S. Dearborn Street, Chicago, Illinois 60616, USA.
pubmed:publicationType
Journal Article